ABC

ABC

Barbara Walters and Diane Sawyer will be hosting live coverage from 4 a.m. to 10 a.m. EST, followed by a special live-in-London broadcast of "Good Morning America" with Robin Roberts. On-site coverage will continue throughout the day with David Muir, Chris Cuomo, Cynthia McFadden, Bianca Golodryga, Nick Watt and Katie Nicholl. Walters will also host a special episode of "20/20" at 9 p.m., "William and Catherine: A Modern Fairy Tale."

Barbara Walters and Diane Sawyer will be hosting live coverage from 4 a.m. to 10 a.m. EST, followed by a special live-in-London broadcast of "Good Morning America" with Robin Roberts. On-site coverage will continue throughout the day with David Muir, Chris Cuomo, Cynthia McFadden, Bianca Golodryga, Nick Watt and Katie Nicholl. Walters will also host a special episode of "20/20" at 9 p.m., "William and Catherine: A Modern Fairy Tale." (ABC)

Barbara Walters and Diane Sawyer will be hosting live coverage from 4 a.m. to 10 a.m. EST, followed by a special live-in-London broadcast of "Good Morning America" with Robin Roberts. On-site coverage will continue throughout the day with David Muir, Chris Cuomo, Cynthia McFadden, Bianca Golodryga, Nick Watt and Katie Nicholl. Walters will also host a special episode of "20/20" at 9 p.m., "William and Catherine: A Modern Fairy Tale."